Thales

Airbus Helicopters

Safran Electronics & Defense

Sagem Defense Securite

Christophe Tuzi

Yann Vandenbaviere

Gerard Nemoz

Philippe Bieth

Pascal Coppee

Gérard Nemoz

Cedric Bara

Sebastien Lhenoret

Cédric Bara

Olivier Gallay

Eric Bourgogne

Sébastien Lhenoret

A method for verifying the integrity of data transmission between a main upstream unit () and a main downstream unit (). The method includes the implementation of the following steps: a data-processing module () of the main upstream unit () generates a first frame (T) including a packet (P) of data to be transmitted and a cyclic redundancy code (E) of the packet (P); encapsulates the first frame (T) in a second frame (T) which also includes a cyclic redundancy code (C) of the first frame (T); encapsulates the cyclic redundancy code (E) of the packet (P) in a third frame (T); the data-processing module () of the at least one auxiliary upstream unit () compares each of the cyclic redundancy codes (E) extracted from the first frame (T) with those extracted from the third frame (T); and confirms the integrity of data transmission to the main downstream unit () only if the comparison is positive.

Method for verifying the integrity of data transmission between a main upstream unit and a main downstream unit

The invention relates to a fly-by-wire system which comprises: three-stage piloting control, each stage including a control computer suitable for determining the positions of the stick, and a monitoring computer capable of verifying all the pre-determined positions of the stick; three-stage control-surface position calculation, each stage including a control computer suitable for calculating the control-surface positions from encoded positions of the stick, and a monitoring computer capable of verifying all the calculated control-surface positions; a single unidirectional communication link connecting the control computer of the first piloting control stage to the control computer of the first control-surface position calculation stage; a single unidirectional communication link connecting the control computer of the second piloting control stage to the control computer of the second control-surface position calculation stage; and a single unidirectional communication link connecting the control computer of the third piloting control stage to the control computer of the third control-surface position calculation stage.

Fly-by-wire control system for aircraft

The present invention relates to an electronic equipment rack arrangement principle. In order to allow for the maximum use of COTS (component off the shelf) modules, or, at least, maximum use of 'standardized' modules, primarily in relation to the electronic functions of said rack, the electronic equipment rack according to the invention offers a configuration in which the function modules () and the interface modules () are juxtaposed, preferably vertically, and the electronic functions handled by the function modules () are decoupled from the interface functions handled by the interface modules (). Such a rack also allows for all the maintenance operations to be done through the front panel (F) of said rack, all of its component modules being made accessible from this side.

Avionics rack arrangement

Growing community of inventors

Boulogne-Billancourt, France

Christophe Tuzi